EP 0986047 A2 20000315 - Audio encoding system
Title (en)
Audio encoding system
Title (de)
System zur Audiokodierung
Title (fr)
Système de codage audio
Publication
Application
Priority
GB 9819920 A 19980911
Abstract (en)
A method of switching between long and short block encoding of frames of audio data with improved noise reduction in relation to the number of bits required for encoding. The method comprises the steps of calculating the difference in the long block perceptual entropy of a present frame and the preceding frame and switching to short block encoding of the present frame if the difference is greater than a first threshold. The method may further comprising the steps of comparing the long block perceptual entropy of the succeeding frame with a second threshold if the difference is greater than the first threshold, and switching to short block encoding of the succeeding frame if the long block perceptual entropy of the succeeding frame is greater than the second threshold. The method may additionally or alternatively involve the study of the perceptual entropy of short blocks. <IMAGE>
IPC 1-7
IPC 8 full level
G10L 19/14 (2006.01); G10L 19/18 (2013.01)
CPC (source: EP)
G10L 19/18 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0986047 A2 20000315; EP 0986047 A3 20010926; GB 9819920 D0 19981104
DOCDB simple family (application)
EP 99202927 A 19990908; GB 9819920 A 19980911